Trap.



D. CRAIG.

TRAP.

APPLICATION FILED DEC.30, 1912.

1 152,3QO. Patgnted Aug. 31, 1915.

/ IIIIIIIII/III/IIIIII/IA DAVID CRAIG, 0F PEABODY, MASSACHUSETTS.

rear.

treason.

Specification of Letters Patent.

Patented Aug. 31, 1915..

Application filed December 30, 1912. Serial No. 739,184.

To all whomjt may concern Be it known that I, DAVID CRAIG, a citizen of the United States, and resident of Peabody, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Traps, of which the following is a specification.

This invention relates to waste traps for use in plumbing systems, and is particularly designed for use in connection with the waste pipe of a bath room fitting such as a bath tub. Its principal objects are to pro vide a trap which is adapted to rest on the floor where it is easy to install or remove, accessible for the purpose of cleaning or repairing, and is at the same time of acceptable and handsome appearance.

A further object is to provide such a'trap wherein provision is made to prevent the destruction of the water seal by the drawing off of water within the trap in the event of the formation of a vacuum or partial vacuum in the waste pipe on the sewer side of the tra 3.

Iieferring to the drawings, which illustrate an embodiment of the invention,. Figure l is a side elevation of my improved trap showing the same in operative position resting on the floor and connected with the bath tub; Fig. 2 is a longitudinal, central section, enlarged, of said trap; Fig. 3 is a plan view of said trap with the cover removed to show the interior; and Fig. 4c is a cross section on line 4-4 of Fig. 3.

A represents the body of the trap having formed integral therewith a throat A, the body and throat being flat on their under sides in order to rest solidly upon the floor F, as shown in Fig. 1. An aperture is provided in the bottom of the body A surrounding which is an upwardly extending hub or sleeve B, screwed into boss A Within the hub B is secured the waste pipe C, the two being sealed together by a packing of lead or other suitable material D, which closes the joint between the hub B and pipe C.

At the outer end of throat A is provided an aperture through the top wall of the throat, surrounded by a hub or boss A in teriorly threaded and connected by the waste pipe E with the bath tub T. On the inner side of the upper wall of the throat A is a centrally arranged projection A wedge shaped, as best shown in Fig. 3, the apex of the wedge being toward the outer end of the throat. This projection A in effect divides the passage through the throat A into two relatively deep, diverging channels or passageways a, a substantially tangential to the body or casing A.

At or near the top of the hub B is a pair of wings or deflectors B so arranged at either side of the projection A that they are opposite and above the ends of the two channels or passageways a, o

The top of the body A is provided with an annular flange a having a beveled top face upon which rests the lip g of the cover G. The cover G, which is of dome-like form, is secured upon the body A by a locking ring H. This locking ring is made in two parts hinged together at h. and has a flange 71 adapted to fit under and against the flange a, and a beveled upper flange of the same contour as the upper beveled face of flange a, so that when the locking ring is closed around the flange a and the lip g of the cover, the cover, G will be securely clamped and'held in place upon body A, with a perfectly sealed joint between the peripheries of the cover G and body A. A lug h is provided at the free end of each of the two sections of the clamping ring H for the reception of a clamping screw J, which draws the two sections of the ring tightly together into position.

It will be understood that the water in the trap normally stands at the level of the upper end of sleeve or hub B which maintains the water level for sealing the trap as indicated in broken lines in Fig. 2. In case a vacuum or partial vacuum should occur in waste pipe C, which should tend in an ordinary trap suddenly to draw the water out of the trap emptying it and thus unsealing it, with the present device as soon as the water in pipe E and throat A falls far enough to open the air passages a, M, which will occur before the throat A as a whole is emptied, air will be admitted through said passages or channels, thus relieving the tension of the vacuum and preventing the water in the trap from being sucked or drawn out into the waste pipe C. The wings B opposite the ends of the channels a, a tend to arrest and deflect the water coming therethrough and in a measure prevent the water fromentering pipe C and being lost until the air coming through said passages relieves the vacuum and the tendency to empty the trap is arrested. The air channels a, a diverge, as already stated, and

enter the body A in directions substantially 7 tangential thereto, at either side of the hub B, so that any Water carried through said channels With the air instead of tending to 2;; pass directly toward the opening of the hub B is carried. to the sides, and meeting, the deflectors B Will fall back into the trap.

It will be noticed that the seal between the cover G and the bodyA is below the normal Water level in the-trap*,'that is, below the top of the hub 13, thus insuring the detection ofany leak in such joint, which might exist if the seal Were above the Water level and permit the escape ofgas.

I claim:

1. A trap comprising in combination a body, having an outlet opening, avva-ste'pipe secured to said body, and' a throat opening into saidzbody provided with a Waste pipe opening, and a projection upon the upper, inner Wallflthereof forming tWo' air passages.

2; A- trap comprising in combination a body, apipe in said body having an outlet opening and a throat connnunicating'with said b dY, a hub surrounding said opening, and a projection upon' the upper, inner Wall .of said throat forming t vo air passages, said hub provlded' w-lth a panel? ings disposed upon opposite sides of said projection in said throat.

3; A trap comprising in combination a body having an outlet opening, a hub in said body surrounding said opening, a waste pipe secured in said hub, a throat opening into said body provided with a waste pipe opening andaprojection upon its upper, inner Wall forming tWo air passages, said hub having at or near its top a pair of Wings disposed on opposite sides'of said projection in said throat.-

a. A- trap comprising in combination a 1 body having anoutlet opening, a hub in said body surrounding said opening, a Waste pipe secured in said hub, a throat opening into said body provided with a waste pipe openingan'd a Wedge shaped project-ion upon its upper, innerwall forming two air passages, said hub-having at or near its top a pair of Wings disposed on opposite sides of said projection.

Signed by me at Boston, Massachusetts, this 27th day of December, 1912.

DAVID CRAIG.

VVitne'sses ROBERT CUsHMAN, CHARLES D. WOODBERRY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

, WashingtonyD. 0. 

